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Analysis of mechanical resonance mechanism and fast identification of resonance characteristic for 2-mass system with elastic load
Author(s): 
Pages: 112-120
Year: Issue:  4
Journal: Electric Machines and Control

Keyword:  servo systemmechanical resonanceidentification of resonance-characteristicPseudo ran-dom sequenceChirp signal;
Abstract: Mechanism of mechanical resonance in two-mass system with elastic transmission was analyzed. First of all,the quantitative relation between magnitude characteristic of open/closed-loop continuous sys-tem and natural resonant characteristic was contrasted.According to the relation,the resonant mode was confirmed.In discrete system,the effect of controller' s rigidity on oscillation in closed-loop discrete sys-tem was analyzed.The resonant frequency at the state of sustained oscillation in discrete system is NTF. Through the analysis of resonance mechanism,the natural resonant characteristic is important to eliminate resonance.Two methods of fast acquirement of resonant characteristic were discussed based on Pseudo random sequence and Chirp signals.According to the identified frequency,the parameter of notch filter was determined.The results of simulation and experiment demonstrate the accuracy of this method and the suppression effect based on this method.
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